package com.yms.jvm.returnAddress;

import java.util.ArrayList;
import java.util.List;

/**
 * @version : 1.0
 * @author: yangmingsong
 * @date: 2022/7/16-07-16-13:49
 * @description: spring5Test
 */
public class Test1 {

    public static void main(String[] args) {

        A a = new B();
    }
}
class A{

}
class B extends A{

}